Dynamo-electric machine.



No. 744,084. PATENTED NOV. 17, 1903.

' G. MACLOSKIE.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED JULY 19, 1902.

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UNITED STATES Patented November 17, 1903.

PATENT OEEIcE.

GEORGE MACLOSKIE, OF SOHENEOTADY, NEW YORK, ASSIGNOR TO GEN- ERALELECTRIC COMPANY, A CORPORATION OF 'NElV YORK.

DYNAMO-ELECTRlO MACHlNE.

SPECIFICATION forming part of Letters Patent No. 744,084, dated November1'7, 1903.

Application filed July 19, 1902. S rial N 116,288. (No model.)

To aZZ whom it may concern:

Beit known that I, GEORGE MAOLOSKIE, a citizen of the UnitedStates,residing at Schenectady, county of Schenectady, State of NewYork, have invented certain new and useful Improvements inDynamo-ElectricMachines, of which the following is a specification.

My invention relates to dynamo'electric machines, and more especially torailway-motors.

As railway-motors have been built heretofore the armature-core laminaehave consisted of fiat disks, and as a consequence there has beenconsiderable lost space between one end of the core and the commutator,while at the other end of the core the space has been overcrowded, sothat the journal-bearing at the pinion end of the armature was sorestricted in length that it heated very easily and the ventilatingair-passages were throttled, so that the efficiency of the motor waslessened.

The object of my invention is to provide an arrangement of armatureparts so that the space heretofore unoccupied may be utilized to relievethe more congested portions.

To this end my invention consists in pressing the core laminae of thearmature into cup shape and assembling them so that their centralportions will project into the space beneath the ends of thearmature-coils at the commutator end of the armature, whereas at theopposite end of the core a cavity is provided for the reception of theextended journal-bearing and to permit of the free flow of air betweenthe end of the core and the hearing.

My invention will be more readily understood by reference to theaccompanyingdrawings, forming a part of this specification, in whichFigure 1 shows in longitudinal section a carmotor with one modificationof my invention applied thereto, and Fig. 2 shows in perspective one ofthe pressed core laminte.

As shown in the drawings, the armatureshaft 1 has the head 2 at theright-hand or pinion end driven to a shoulder thereon and the corelaminae 3 threaded upon it and held pressed together in position by theleft-hand or commutator-head The head 2 has its outer periphery extendedto receive the ends of the armature-coils in the usual manner, while itsright-hand side is dished or made funnel shape to permit thejournal-bearing 5 to extend inwardly with sufficient space between theparts to permit an unobstructed flow of air therethrough to theapertures in the core. The left-hand surface of the head 2 has its outerportion in a plane, while its inner portion, starting from a circlewithin the row of coil-slots, according to the shape of the laminations,is conical or frusto-conical in shape.

The core-disks 3 may be made in any desired shape, with apertures cuttherein for the passage of air and with notches in the edges for thereception of the armature-coils. These disks are stamped or embossedinto a conical or cup shape, as shown in Fig. 2. The extent of theembossed portion may be made as great or small as desired. It may extendto the periphery of the disk or it may extend but a fraction of thatdistance, depending upon the construction of the particular machine towhich my invention is to be applied. The laminae 3 are threaded upon thearmatureehaft 1, with space-blocks 6 arranged at intervals. The head 4:at the commutator end has its outer periphery adapted to receive andsupport the ends of the armature-coils, while its right-hand face ishollowed out conically to fit against the cupshaped core laminae. Theopposite side of said head may be made in any shape desired, with ashoulder turned thereon for engagement with the nut 7, engaging screwthreads on the shaft, whereby the parts are clamped rigidly together.

Both of the heads 2 and 4 are suitably chambered or recessed on theirinner faces to provide air ducts or channels between them and thelaminated core.

it is to be noted that in the arrangement above described all thelaminations may be alike, that the length of the journal-bearing at thepinion end of the armature may be lengthened an amount equal to thedepth of the embossed or cupped portion of the laminae, and that theair-space between the outside of the bearing and the end of thecore-head is greatly enlarged as compared with present forms ofdynamo-electric machines.

My invention is equally applicable to dynamos and motors wherein acentral hub or sleeve or a spider is employed for supporting thelaminze, and I therefore desire it to be understood that 1 do notrestrict myself to the construction shown and described.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is-

1. An armature-core comprising a series of cup-shaped laminae.

2. An armature-core composed of a series of laminae, the inner portionsof which are embossed or pressed into cup shape.

3. An armature for dynamo-electric machines having a dished head at oneend extending Within the plane of the core end, a core consisting of aplurality of cup-shaped meow laminae, a second head, and means forsecuring said parts together.

4. An armature for dynamo-electric machines having a shaft, a dishedhead mounted on said shaft and extending Within the plane of the coreend, a core consisting of a plurality of like cup-shaped laminae mountedon said shaft, a second head, and means for drawing said heads towardeach other.

5. A laminated core-disk having a central aperture and peripheralnotches and having the portion inside of the peripheral notches embossedor pressed into cup shape.

In witness whereof I have hereunto set my hand this 12th day of July,1902.

GEORGE MAOLOSKIE.

Witnesses:

R. O. CHAPMAN, EDWARD \VILLIAMS, J r.

